package jjn.carl.dp;

import java.util.*;

/**
 * @author Jjn
 * @since 2023/8/21 10:46
 */
public class LeetCode139 {
    public boolean wordBreak(String s, List<String> wordDict) {
        boolean[] dp = new boolean[s.length() + 1];
        dp[0] = true;
        Set<String> set = new HashSet<>(wordDict);
        for (int i = 0; i <= s.length(); i++) {
            for (int j = 0; j < i; j++) {
                if (dp[j] && set.contains(s.substring(j, i))) {
                    dp[i] = true;
                    break;
                }
            }
        }
        return dp[s.length()];
    }
    
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int count = scanner.nextInt();
        List<String> wordDict = new ArrayList<>(count);
        for (int i = 0; i < count; i++) {
            wordDict.add(scanner.next());
        }
        String s = scanner.next();
        boolean wordBreak = new LeetCode139().wordBreak(s, wordDict);
        System.out.println(wordBreak);
    }
}
